Many-body corrections in XAFS

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The importance of many-body effects in the theory of XAFS is reviewed. The dominant effects are inelastic losses: Extrinsic losses refer to inelastic losses in the propagation of the photoelectron and are treated using a complex, energy-dependent self-energy. The real part of the self-energy yields an important energy-dependent shift in the phase of the XAFS oscillations, while the imaginary part contributes to the mean-free-path. Intrinsic losses refer to losses associated with the creation of the core-hole. They give rise to shake-up/shake-off contributions to the absorption spectra. These losses may be calculated in terms of a corehole Green's function. Interference between ... continued below

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Pages: (5 p)

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Rehr, J.J. January 1, 1992.

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The importance of many-body effects in the theory of XAFS is reviewed. The dominant effects are inelastic losses: Extrinsic losses refer to inelastic losses in the propagation of the photoelectron and are treated using a complex, energy-dependent self-energy. The real part of the self-energy yields an important energy-dependent shift in the phase of the XAFS oscillations, while the imaginary part contributes to the mean-free-path. Intrinsic losses refer to losses associated with the creation of the core-hole. They give rise to shake-up/shake-off contributions to the absorption spectra. These losses may be calculated in terms of a corehole Green's function. Interference between these processes leads to dynamical corrections, which are important at low energies.

Physical Description

Pages: (5 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • International workshop on surface x-ray absorption fine structure (XAFS), Jaipur (India), Aug 1992

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  • Other: DE93011002
  • Report No.: DOE/ER/45415-9
  • Report No.: CONF-9208221--2
  • Grant Number: FG06-90ER45415
  • Office of Scientific & Technical Information Report Number: 6369100
  • Archival Resource Key: ark:/67531/metadc1209676

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1992

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  • July 5, 2018, 11:11 p.m.

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  • Aug. 7, 2018, 1:43 p.m.

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Rehr, J.J. Many-body corrections in XAFS, article, January 1, 1992; United States. (digital.library.unt.edu/ark:/67531/metadc1209676/: accessed January 15, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.